Saudi Arabia pledged $1 billion to help Gaza residents rebuild following Israel's three-week military operation, but its relations with the terror group deteriorated after supporting Egypt's refusal to open the Rafah border crossing, despite demands by Hamas.

Besides that, both Egypt and Saudi Arabia boycotted an "emergency" Arab conference in Qatar last month, meant to rally support for Hamas.

Saudi contractors fear potential reprisals by Hamas against its construction crews so they are refusing to send them at this time.

"The necessary measures must be taken to ensure safety," said Abdullah al-Amar, chairman of the Saudi National Contractor's Committee, who also serves on the kingdom's Chamber of Commerce and Industry.

Committee member Muhammad al-Atas said Saudi companies were fearful of the political and security situation in Gaza.

"It's dangerous going to areas where there is no political authority and where the security situation is shaky," al-Atas said.